Despite the heavy reliance on e-mail, in certain situations calling may be the most efficient channel of communication, whether mobile or on your office line. be sure to understand professional expectations for telephone, cell phone, and voice mail etiquette. identify the telephone etiquette that will make your telephone calls productive. check all that apply.(a) end the call politely.(b) use a three-point introduction.(c) be brisk when rushed.(d) be cheerful and accurate.(e) deliver bad news via voice mail.